Chain lock



Jan. 13, 1931. c. 1.7 JOHNSON 1,738,396

CHAIN LOCK Filed April 9, 1928 INVENT OR (a/w'n L. JBAnJon.

A TTORNE Y or the like.

My invention has for 1ts ob ects the pro-' Patented Jan 13,1931

oars ares COLVIN L. JOHNSON, OF ST. LOUIS, MISSOURI, ASSIGNOR, BY MESNEASSIGNMENTS, TO

rnAnKo. WEBB, or sr. LOUIS, Misscurvr;

CHAIN LOCK Application filed April 9, 1928.

T his invention relates generally to looks anchmore particularly, to acertain new and useful improvement in locks especially adapt ed forfastening together the ends of a chain vision of a lock of the class andfor the purpose stated whlch may be readily manufactured,v which iscompact and durable in struc-- ture, which. is conveniently operable,and which is eiiicient and satisfactory in use wherever foundapplicable.

Andwith the above and other objects in view, my invention resides in thenovel features of form, construction, arrangement, and

combination. of parts hereinafter described and pointed out in theclaims. In the accompanying drawing, Figure 1 is a plan view, partlybroken away and in section, of a lock embodying my inven tion, shown inoperative locking engagement with the opposed ends of a chain; v

Figure 2 is an elevational view, also partly broken away and insection,of the lock;

Figure 3 is a plan view of the lock, show:

ing the lock in manipulation during the engagement of a chain therewith;l Figure l is a transverse sectional view of the lock; and i Figure 5shows in elevation and in assembling relation the several parts of thelock;

Referring now more in detail and by: reference characters to thedrawing, which illus tratcs a preferred embodiment of my invention, thebody of the lock is constructed of a pair of companion members A, B,preferably circular in contour, each of which members has a fiat innerface, as at 1, for flatwise abutting relation the one with the other,and each i of which. is preferably generally flat upon its outer face,as at 2, with the outer peripheral corners thereof rounded or arcuate,as at 3.

Circumferentially, at and adjacent their inner face, each of the membersA, B, is similarly cut-away or recessed, as at A, and peripherallyunder-cut, s at 5, for providing an annular way, as at 6, and an annularretaining flange 7 for a locking-ring C preferably knurled or otherwiseroughened upon its outer periphery, as at 8, and which ring has SerialNo. 268,623.

posed ends 10,10, suitably spaced onefi'om the other, as best seen inFigure 3, and diametrically opposite said end-spacing is provided uponits inner periphery with a recess 11. V

The member B has anaxial bore, as at 12, and projecting axially from theinner. face of member A to fit and reside in the boreI12 of member B, isa cylindrical extension 13, the member A and its extension 13 having acontinuous bore, as at 14;, whose opposite ends open, when the members Aand B are inassembled abutting relation, upon: the outer opposed faces 2of the members A and B, as best seen in Figure 4. It willbe noted, however, that the member A iscounterbored to provide an annular shoulder,as at 15, at one end of bore 14, forpurposes shortly appearing, the Ycylindrical extension 13 being clinched or upset at its outer end, as at16, upon the member B, whereby the members A and .B are rigidly andpermanently secured together with their said inner faces 1 in tightflatwise abutting relation, and whereby also, through the retainingengagement of the annular flanges 7 with the shouldered portion 9 ofring C, the ring G is permanently retained for bodily rotatory movementin the circumferential groove or way 6 provided, as described, in and bythe opposed siirface-recesses 4:5 of the members A and B. For purposesalso soon to appear, the conjoined or united members A and-B areperipherally notched 0r recessed at preferably diametrically oppositepoints, as at 17, 17,.which. notches interrupt the way 6 and arepreferably of arcuate contour at their base, as shown, and the mouth ofeach of which has a width circumferentially of the members A, B,approximately equal to the spacing of the ring-ends 10.

. Disposed for rotatory movement in the bore 14, is a lock-barrelorcylinderD of any standard type adapted for rotatory actuation by meansof a special or particular insertable key E. Cylinder D is of somewhatreduced diameter relatively to the diameter of the body-bore 14, and, asbest seen in Figure 4, the outer or key-opening end of cylinder D ispresented to and approximately flush with .the outer end .face 2 of thelock bodyememher A, the cylinder D at its said end having an annularcollar 18 snugly fitting forrotatory movement in the confines ofthebodyshoulder 15. Fixed on the cylinder D pref-- erably immediatelyadjacent collar 18, is an arcnate lug 19 adapted to abut againstthebody-shoulder 15 to permanently retain the barrel or cylinder D againstendwise removal through the end face 2 of member A. F or purposespresently appearing, the lug 19 extends merely chordwise relatively tothe cylinder D, and adjacent its inner end, the cylinder D is cutawayand thereby provided with a surface cam-recess, as at 20.

Driven or'otherwise fixed to reside permanently in bore 14 with theouter face of its end-wall 21 approximately flush with the outer face 2of the lock body-member B and with its side wall 22 embracing thelock-cylinder D, is a cup-shaped member F. At diametrically oppositepoints, the side wall 22 of member F is slotted, as at 23, 23,toaccommodate and for co-operation with the keyactuable tumblers ordevices 21 of the cylinder D, and at its rim has a projection or'finger25 fitting intermediate the ends of the chord-lug 19 and providing, byengagement with the ends of lug 19, a stop for limiting the rotarylocking and unlocking oscillations of the cylinder D. I may add herethat the member F permanently retains the lock-cylinder D from endwiseremoval through the end-face 2 of the body-member B.

Formed inthe lock body-member -B and opening at its outer end into thewayor groove 6, is an obliquely disposed recess 26 which communicates atitslo'wer end with a series of preferably diametrically reduced andregistering openings 27, 28, and 29 formed, respectively, in thebody-member B, the extension 13 of bodygmember A, and

the side wall 22 of thecup-member F. Dis-V posed obliquely for endwiseshiftable'movement in the recess 26 and said communicating andregistering openings 27, 28 and 29 isa pin G preferably cam-wise roundedat its rear end, as at 3.0, and having at its other end a preferablyeilarged head 31 contoured, as shown, for releasable engagement *ith thering C at its peripheral'recess 11. Coiled on the pin G and abutting atits ends against the pin-head 31 and. the end wall of the recess 26, isa spring 32 adapted to .yieldingly maintain the pin Gin engagement atits head 31 withthering C. Formed in a portion of thebody-members A, B,at the base of the way 6, is a. counter groove 33,1 adapted to work inwhich is alprojection 34 formed on ieldin 'l move or shift inwardly whenthe ring C may be freely rotarily moved first in one direction and thenin the other, indicated by the arrows in Figure 1, to dispose its spacedends 10 successively in radial alignment with the walls of theperipheral body notches 17 for successive disposition therein of therespective end-links or other end-niel'nbers of a chain'H orthe-like.The chain ends being so disposedand' the ring rotanly shifted to lockingposltion, in which position the ring C, whileengaging the chainends, isdisposcd across'or over and provides a closure for said notches 17, thecylinder D is reversely key-actuated, when the pin G Wlll be camwiseshifted outwardly to seat and engage at its head 31' in and with thenotch 11 of ring'C and ring C thereby locked against rotary movementwith the chain links held thereby in the'body notches 17 the ring Cbeing so retained against rotary movement solong as the cylinder D is innormal lockedi condition with its cam-recess 20 outof registration withthe opening 29 in the member F,

and it may be here stated 'thatthe cylinder D is so constructed that thekey E may not be withdrawn until'the cylinder .1) is in normal lockedcondition. which adds an element of safety to my new look. As is usual,a pivoted-piece 35 is provided on the barrel or cylinder D to normallyprotect the cylinderkey-opening against the entrance of dust, dirt, andthe like. v

I am aware that changes in the form. construction, arrangement, andcombination of the several parts of my new lock may be made andsubstituted for those herein shown and described without departing fromthe nature and principle of my invention.

Having thus described my invention, what I' claim and desire to secureby Letters Patent is:

1. In a lock, in combination, a circumferentially grooved andperipherally notched body-member, a split rigid ring mounted in saidgroove and encircling the body-member for rotatory closure movementacross the mouth-of the notch, the ring being provided intermediate itsends with a body-recess, and means for 'releasably locking the ring innotch-closing position,said means including a pin'endwise shift able inthe body-member and 'engag'eab'le with the ring at said recess.

bodv-member, a s )lit ri 'id rin mounted in sair groov and encirclingthe body-member for rotatory closure movement across the mouth of thenotch, the ring being provided intermediate its ends with a body-recess,and key-actuahle means including a pin endwise shiftable in thebody-member and engageable with the ring at said recess for releasalolylocking the in notch-closing position. v

3. In a lock, in combination, a peripherally notched body-member, asplit rigid ring mounted on the body-member for rotatory closuremovement across the mouth of the notch, the ring being providedintermediate its ends with a body-1 ccess, and key-actuable means uponthe body-member for releasably locking the ring in notch-closingposition, said means including a pin mounted for endwise movement in thebody-member and engageable with the ring at said recess, and a rotarycylinder normally retaining the pin in engagement with the ring. f v

s. in a lock, in combination, a peripherally notched body-member, a"split rigid ring mounted on the body-member "for rotatory closuremovement across the mouth of the notch, the ring being providedintermedi ate its end'with a body-recess, and key-actua-* ble means uponthe body-member for releasably locking the ring in notch-closingposition,

said means including a spring-pressed pin normally yieldingly engagingthe ringat said recess, and a rotary cylinder normally re taining thepin in engagement with the ring.

In a lock, in combination, a peripherally notched body-iiiember, asplitrigid ring mounted on the body-member for rotatory closure movementacross the mouth of the notch, a spring -pressed pin mounted in thebody-member for normally yieldingly engaging the ring, and alcey-actuable cylinder ionnted for rotary movement in the body-membertor normally retaining the pin in e; moment with the ring, the cylinderhavin; a surface recess adapted, when in registration v.1 i hepin, topermit depression of the pin and out of lockiz-ig engagement with, thering. v

(3. in a lock, in combination, a periplr era ily notched and circuitially grooved Indy-member, a split rigid ring TGtillllECl in saidgroove for rotatory closure movement acr the mouth oi the notch, thering hava recess on its inner periphery, a spring:-

sed pin mounted in the body-member for normally yieldingly engaging atan end with the ring at sa ,1 recess, and a key-actuabie cylindermounted for rotatorymovement in the body-member and normally engagingthe pin at its other end for locking the same in engagement with thering, the cylinder having a surface recess adapted, when n registrationwith the pin, to permit deprcs sion of the pin by, and out of lockingengagement, with, the ring.

7. In a lock, in combination, a bodyinember circular in contour-having acircumferential surface QI'OOVQ,tllQlfQ'bGlHg a peripheral notch in thebod member interru atin said. groove, a split rigioring encircling thebody-member and retained in said groove "lor rotary closure movei'nentacross the mouth of the notch, the ends of the ring being adapt ed forregistration with the walls of the notch to permit placement into thenotch of the apertured endof a chain, the ring being providedintermediateits ends with a body recess, and key actuable meansincluding" an endwise shiftable pin engageable with the ring at saidrecess for locking the ring against rotary movement and in notch closureposition. v

8. Ina lock, in combination, a body-menu her having a circumferentialgroove, there being diametrically opposed peripheral notches in thebody-member interrupting said roove, a snlit rigid ring retained in saidgroove for, rotary movement across the mouths of said notches, the ringbeing adapted for successive registration with said notches to permitthe successive disposition therein of the ends of a chain, andhey-actuabie'means in the bOClY-HlGlYllJGPfOI locking the ring againstrotation and innotch closure position.

9. In a lock, in con'ihination, a body-mem her having a circumferentialgroove, there being diametrically opposed peripheral notches in the bodymember nterrupting said groove,'a split rigid ring retained in saidgroove for rotary movement across the mouths of said notches, the ringbeing adapted for successive registration vith said .sure position, saidmeans comprising spring-pressed pin yieldinglyengaging the ring, and acylinder normally holding the pin against movement and in engagementwith the ring. r

10. In a lock, a pairot companion men hers disposed flatwise in abuttingregistering relation, one of said members h. *ing an axial bore, anintegral. tubular extension upon the other of said members, saidextension projecting into and through said bore and beingupset at itsouter end upon the bored memher for permanently securing said membersco-operatively together, and a lock-cylinder permanently secured to saidmembers to reside within said extension.

11. In a lock, in combination, a circumferentiallygrooved andperipherally notched annular body-member, a split rigid ring mounted insaid groove and encircling the body memberfor rotatory closure movementacross'the mouth of the notch, and means for releasably locking the ringto the bodymember in notch-closing position.

0 In testimony hen-39f, I have signed my name to th1s speclfica-tlon.

COLVIN L. JOHNSON.

